540985831 has 2 divisors, whose sum is σ = 540985832. Its totient is φ = 540985830.

The previous prime is 540985813. The next prime is 540985871. The reversal of 540985831 is 138589045.

Together with previous prime (540985813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 540985831 - 2⁵ = 540985799 is a prime.

It is a super-2 number, since 2×540985831² = 585331338685521122, which contains 22 as substring.

It is equal to p_28397437 and since 540985831 and 28397437 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540985811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270492915 + 270492916.

It is an arithmetic number, because the mean of its divisors is an integer number (270492916).

Almost surely, 2^540985831 is an apocalyptic number.

540985831 is a deficient number, since it is larger than the sum of its proper divisors (1).

540985831 is an equidigital number, since it uses as much as digits as its factorization.

540985831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 540985831 is about 23259.1021107867. The cubic root of 540985831 is about 814.8205313234.

The spelling of 540985831 in words is "five hundred forty million, nine hundred eighty-five thousand, eight hundred thirty-one".